Upper part of fastening device



FIG. 1 is a top perspective view of an upper part of a fastening device showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a right side elevation view thereof, the opposite left side being a mirror image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof. 

The ornamental design for an upper part of fastening device, as shown and described. 